Microsoft Security Essentials (MSE) is a free security suite that is becoming more and more popular. It can be installed on Windows XP, Windows Vista, and Windows 7. X-Rite Applications has detected some instrument detection issues when a customer has MSE running on their computer. As with most other anti-virus/firewall vendors, simply setting an exclusion or program permission for the X-Rite program will correct the issue. For MSE, use the following instructions: